Magpie - Female travelers club - meet women like you when you travel
Simmer (formerly Foodie) - Yelp, but for every dish on the menu
Travel Diaries - Create your own travel diary to capture your experiences
Spoon University - Food network for next generation.
tripcake - Doodle for travel plans with friends
NYT Cooking - iPhone app with 17,000 free recipes from The New York Times